Finding the Fourth Proportional to 2,216.52, 3,323.52 and 917.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.52 : 3,323.52 = 917.28 : x
2. Step 2: Convert to fraction form
   2,216.52/3,323.52 = 917.28/x
3. Step 3: Cross multiply
   2,216.52x = 3,323.52 × 917.28
4. Step 4: Simplify right side
   2,216.52x = 3,048,598.43
5. Step 5: Solve for x
   x = 3,048,598.43/2,216.52
6. Step 6: Final answer
   x = 1,375.40